MODELLING TEMPERATURE AND RADIATION-INDUCED DIFFUSION IN TRANSMUTATION TARGETS
Modelling temperature and radiation-induced diffusion in transmutation targets
Abstract
ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012
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MODELLING TEMPERATURE AND RADIATION-INDUCED DIFFUSION IN TRANSMUTATION TARGETS
Introduction
Methods




 

Γ
Helium in cermet fuel
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ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012
MODELLING TEMPERATURE AND RADIATION-INDUCED DIFFUSION IN TRANSMUTATION TARGETS
Table 1: Binding energy and effective frequency for the reaction HeiVj  He + Hei−1Vj
State
He5V1
He4V1
He3V1
He2V1
He1V1
He2V2
He1V2
This work
2.00
2.54
2.54
2.67
3.64
3.94
3.90
E (eV)
Ref. [6]
2.11
2.4
2.6
2.9
3.8
–
–
Ref. [7]
2.32
2.7
2.61
2.80
3.75
–
–
This work
1.9  1013
1.6  1014
2.3  1013
1.9  1013
7.6  1013
–
–
ν (s−1)
Ref. [6]
0.7  1013
3  1013
5  1013
3.0  1014
5.0  1015
–
–
Ref. [7]
6.2  1014
5.3  1015
2.3  1014
1.4  1014
3.0  1015
–
–
Helium in cercer fuel
Figure 1: Calculated diffusion coefficients for divacancy diffusion of oxygen (solid black line),
Schottky defect migration (dotted black line) and experimentally measured diffusion
coefficient of oxygen (grey crosses and suggested fit from original paper as grey line) [9]
ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012
3
MODELLING TEMPERATURE AND RADIATION-INDUCED DIFFUSION IN TRANSMUTATION TARGETS
Conclusions
References
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ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012